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To solve the equation, we need to try to make the second equation all in x first.From the first equation 2x-y=1,we could rewrite it into y=2x-1,Then we put y=2x-1 into the quadratic equation 10x^{2}

First we can try and factorise the expression:So we want to find 2 numbers that multiply to 6 and add to -5... after some thinking we get -2 and -3The factorised expression is y=(x-2)(x-3...

5n+t= 21n-3t=9n= 9+3t5(9+3t)+t= 2145+15t+t= 2145+16t= 2116t= -24t= -1.55n-1.5= 215n= 22.5n= 4.5

Total number of balls = 4 + 2 + 5 = 11 (this is our denominator for first draw)Using a probability tree, labelling each stem after colour picked. Calculate probability by multiplying first branch by...

Firstly, start off by expanding the brackets on the left hand side of the equationa(4x+12) would expand as below:4x multiplied by a gives 4ax12 multiplied by a gives 12aWe no...